What is CVE-2018-10561?

CVE-2018-10561 is a critical-severity vulnerability in Dasannetworks Gpon Router, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-05-04.

How severe is CVE-2018-10561?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2018-10561 known to be exploited?

Yes. CVE-2018-10561 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-31), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.

Auth bypass in Dasannetworks Gpon Router

CVE-2018-10561

An issue was discovered on Dasan GPON home routers. It is possible to bypass authentication simply by appending "?images" to any URL of the device that requires authentication, as demonstrated by the /menu.html?images/ or /GponForm/diag_FORM?images/ URI. One can then manage the device.

Vulnerability class: Broken Authentication

Published 2018-05-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.928 (99.8th percentile), scored 2026-10-15.

High probability of exploitation in the next 30 days — patch promptly. 100th percentile — 99.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.929 · newest: 0.928 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-31. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-04-21.

Required action: The impacted product is end-of-life and should be disconnected if still in use.

Public proof-of-concept exploits

References

www.securityfocus.com/bid/107053 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
www.exploit-db.com/exploits/44576/ (Exploit, VDB Entry, Third Party Advisory, exploit)
www.vpnmentor.com/blog/critical-vulnerability-gpon-router/ (Technical Description, Exploit, Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-10561?: CVE-2018-10561 is a critical-severity vulnerability in Dasannetworks Gpon Router, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-05-04.
How severe is CVE-2018-10561?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-10561 known to be exploited?: Yes. CVE-2018-10561 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-31), indicating it is being actively exploited. 31 public proof-of-concept repositories are indexed.